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y -ilość aut 6 tonowych
x+y=9
4x+6y=44
x=9-y
4*(9-y)+6y=44
x=9-y
36-4y+6y=44
x=9-y
2y=44-36
x=9-y
2y=8
x=9-y
y=4
x=9-4
y=4
x=5
y=4
samochodów mniejszych było 5 a większych 4